Main Relay (Tercel & Van)
- Using an ohmmeter, check for continuity between terminals 1 and 3. Check for no continuity between terminals 2 and 4. If relay does not test as good, replace relay.
- Connect a 12-volt battery positive lead to terminal 1 and a negative lead to terminal 3. Using an ohmmeter, check for continuity between terminals 2 and 4. If no continuity, replace relay.